Sand-handling apparatus.



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H P. MACDONALD.

SAND HANDLING APPARATUS.

APPLlCATl'ON FILED JUNE 1. 1914.

1,204,467. Patented Nov. 14. 1916.

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HARRY P. MACDONALD, 0F MONTCLAIR, NEW JERSEY, ASSIGNOR TO THE SNEAD & CO. IRON WORKS, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

SAND-HANDLING APPARATUS.

Specification of Letters Patent.

Patented Nov. 14, 1916.

Application filed June 1, 1914. Serial No. 842,052.

1/ '0 all whom it may concern Be it known that I, HARRY I. h/IACDQN'ALD, a citizen of the United States, residing at Montclair, county of Essex, and State of New Jersey, have invented certain new and useful Improvements in Sand-Handling Apparatus, of which the following is a specification.

This invention relates to sand handling apparatus for use in sand molding operations, and particularly to a novel arrange ment of a sand hopper and riddle. One of the primary objects of the invention resides in a novel arrangement and combination of hopper means and riddling mechanism whereby the riddling mechanism acts not only as a gate to control the discharge of sand from the hopper when the apparatus is idle, but also as a means for riddling the sand when it is operated to discharge the sand from the hopper. Another object of the invention resides in the provision of improved means in the arrangement set forth whereby effectiveness in operation is secured, as will further appear.

The foregoing, together with such other objects as may hereinafter appear or are incident to my invention I attain by means of an improved construction which I have illustrated in preferred form in the accompanying drawings wherein:

Fig. 1 is a sectional view through a hopper and riddle illustrating my improvement; and Figure 2 is a section on the line IIII of Figure 1.

As previously indicated, one of the chief objects of my invention is the provision of a novel arrangen'ient of a riddle mechanism in combination with a hopper or other receptacle sui table for containing sand for use in sand molding operations, the chief advantage to be attained by the improvement be ing simplicity and economy in the handling of the sand. This will be readily apparent from the description of the apparatus which follows:

Referring now to the drawings, I have designated the sand-containing receptacle, which is preferred in the form of a hopperas shown, b the numeral 7. Immediately beneath and surrounding the discharge end of the hopper is a trough-shaped riddle comprising a framework 8 in the bottom of which is secured a suitable screen or foraminons member 9. The riddle is supported the flask.

on an open framework 10, and is preferably of the reciprocating type, being operated by means of a motor 11 operating through the gear reduction 12, crank shaft '13 and connecting rod 14. The operating mechanism is mounted on a suitable framework or table 15. The frame of the riddle is in the form of a shallow trough adapted to contain sand which may work past the sides of the hopper. The framework 10 is so arranged that a flask, dumping boX or other suitable container 16 may be received therein in position to receive the sand discharged from the riddle. The flask or other similar member is preferably moved into and out of position in the framework 10 by means of a truck 17 and mounted in the framework are guide plates 18 which are adapted to prevent accidental discharge of sand from the riddle clear of the flask.

WVhen the riddle is idle, it acts as a gate for the hopper and controls the discharge of sand therefrom. When the riddle is being reciprocated, the sand works its way through the screen 9 and is discharged into It will be apparent that this is an economical, simple and efiective way of handling and riddling the sand, the advantages of which will be readily apparent to those skilled in the art to which this invention pertains.

In practising my invention, considerable difiiculty was encountered in providing a riddle which was fine enough to properly riddle the sand for subsequent molding operations and which at the same time would control the discharge of'sa-nd from the hopper, it being found that if a suitable mesh of screen .was used, the riddle was stalled because of the weight of the sand in the hopper supported by the riddle. It was further found that in cases where it was possible to reciprocate the riddle, the riddle carried the sand bodily with it in its movement, and little or no sand worked its way through the screen. In order to overcome these difficulties, I have provided bafile or hold back members 19 which are mounted in the bottom of the hopper adjacent to but spaced slightly above the discharge opening of the hopper. These bafiie members serve the double purpose of restricting the area of the discharge opening and also holding the bulk of the sand, out of direct contact with the screen 9, there obviously being spaces beneath such members unoccupied by sand. The baiile members extend transversely across the hopper and are preferably triangular in cross section with the base of the triangle lowermost, in order that the flow of the sand may not be materially retarded. By providing the baflie members a far greater quantity of sand can be stored in the hopper, while at the same time a greater quantity of sand can be effectively riddled in a comparatively short time. The apparatus eliminates a number of steps necessary in carrying out molding operations in the customary manner, and is simple, and economical and very rapid in delivering sand.

I claim:

1. An apparatus of the character described comprising in combination a sand containing receptacle having a discharge opening, a horizontally recipro'catory riddling member adapted to act as a gate controlling the discharge of sand from said opening, a plurality of spaced bars located above the riddle for preventing the entire mass of sand from coming into direct contact with the riddling member and means for reciprocating the riddle.

2 An apparatus of the character de scribed comprising in combination a sand gular bars located above the riddle for preventing the entire mass of sand from coming into direct contact with the riddling member.

An apparatus of the class described, comprising in combination, a sand containing receptacle having a discharge opening, a trough-like member surrounding the said discharge opening and having in its bottom a screen through which the sand is riddled, and a plurality of spaced bars located above the screen for preventing the entire weight of the sand thereabove from bearing on the screen.

In testimony whereof I have hereunto signed my name in the presence of two subscribed witnesses.

HAHRY P. MACDONALD.

Vitnesses r C. C. GREENLEE, J. F. ARNOLD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

7 Washington, D. 0. 

